Wood-working machine



(No Model.) 3 Sheets-Sheet 1:

J. SGHOFIELD.

WOOD WORKING MACHINE.

No. 396,298. Patented Jan. 15, 1889.

(No Model.)

J. SOHOFIELD.

3 Sheets-Sheet 2.

I WOOD WORKING MACHINE. No. 396,298.

. tented Jan. 15, 1889.

" "lUl F (No Model.) 3 Sheets-Sheet 3. J. S'OHOFIELD.

WOOD WORKING MACHINE. No. 396,298. 'PatentedJan. 15,1889.

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UNITED STATES FATENT OFFICE.

JOHN SCHOFIELD, OF NEII HAVEN, CONNECTICUT.

WOOD-WORKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 396,298, dated January 15, 1889. Application filed June 5, 1888- Serial No. 276,168. (No model.)

To all whom it may concern:

Be it known that 1, JOHN SOHOFIELD, a citizen of the United States of America, residing at New Haven, in the county of New Haven and State of Connecticut, have invented cer- 'tain new and useful Improven'lents in VoodlVorking Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention is an improved wood-working machine, and is especially adapted for mortising, but may be used for other purposes, as it is adapted to be used independently as a boring-machine or for cutting miters.

The object of the invention is to lessen the expense of the machine as a mortising-niachine without impairing its efficiency and to combine in one apparatus a boring-tool and a reciprocating tool-holder which is adapted to receive a mortising-bit or any other suitable tool which may be operated to effect any desired result by the reciprocation of its holder. I have generally reorganized the machine as a mortising-machine from the plan of such machines as ordinarily constructed, and have endeavored to simplify it and at the same time to add to its efficiency by details of construction, which will be hereinafter fully described.

In the accompanying drawings, Figure 1 represents a perspective view of the machine in use as a mortising-machine. Fig. 2 is a front elevation of the table and the supports therefor, the longitudinal frame of the machine being shown in section. Fig. 3 is a plan view of the complete machine. Fig. 4 is a section on line 03 a; of Fig. Fig. 5 is a de tail showing the adjustable connection of one side of the work-supporting table. Fig. 6 is a plan view of the machine, representing it as used for cutting miters or forming pickets.

I have represented the frame of the machine as made of metal and supported upon feet a a at eachend. The frame extends longitudinally between these supports and has a lower port-ion, b, which serves as a support for the table which holds the work, and a raised portion, 0, which carries the operatingtools, the difference in elevation bringing the work upon the table in line with the operating devices, thus requiring but little adjustment vertically. The part b of the frame contains a slot, d, in which is guided a bracket, e, having a plain front face extending laterally across the frame and forming a bearing for the cross-piece f, against which the work bears. The bracket 6 and cross-piece f are securely fastened together, and they are adjustable back and forth in the slot d by means of the nut and bolt which secure them to the frame. The cross-piecef is provided with castings at either end (shown at g) in the shape of boxes open at front and rear and connected to the cross-piece by angular pieces 1, Figs. 1 and 2, and in the upper and lower parts of these boxes a screw, 2, has its bearing, a pin passing through the lower end to prevent displacement. A screw-threaded nut, 3, is fitted to the screw, and this nut has a projecting bracket secured to it, as shown at 4, and to these brackets is secured the work-supporting table A. The screws 2 terminate in thumb-pieces, by the turning of which the table may be adjusted vertically to any desired extent. As the nuts and their brackets support the table only from one side, I provide independent means for supporting the front end or the opposite side, so as to prevent any undue strain or twist in the operation of the machine upon the table. These means consist of a bracket, h, fitted to the flanges 5 of the frame band provided with a set-screw, 6, by means of which the bracket can be adjusted along the frame of the machine so as to support the table at any desired point beneath the same. This bracket is provided with laterallyextending arms havingopenings therein, and in each'of these openings is placed a pin, 7 terminating in a broad upper end, and each of the arms is provided with a set-screw, by means of which the pins may be adjusted so as to allow of the proper adjustment of the table and at the same time to support the unsupported side of the table.

The work is supported upon the table A and bears directly against the cross-piece f. In order to prevent any forward movement of the work under the operation of the tools used in withdrawing the same, I have provided adjustable. stop-pins 8, which are adjustably supported in brackets 9 by means of set-screws, said brackets being made in the shape of a casting and supported upon the raised part of the frame. These pins 8 terminate in round heads with plain faces, and are adjusted to bear lightly against the work, so as to keep it in place against displacement in this direction. In order to prevent any displacement vertically of the work, I have provided a stop pin, l0, adjustably supported in a socket, 11 forming the end of an adjustable arm, 12, which is slotted, as shown, and is secured to the cross-piece f by means of a thumb-screw, 13. The arm 12 maybe adjusted. to advanc the stop-pin at any point over the work to be held, and the stop-pin may be adjusted to bear lightly upon the work. These pins when adjusted properly hold the material against undue displacement, but do not prevent the work from being easily fed along.

As heretofore mentioned, the operating parts are all supported upon the raised portion of the frame, and in the present case consist of a reciprocating; tool-holder, I3, and a second tool-holder adapted to receive an auger or other boring-tool, the said holder terminating in the shaft 0, screw-threaded, so as to give a boring movement to the tool. The holder 13 has its rear part provided with a series of circumferential grooves, '2', and provided with a front and rear bearing, as shown at 1i and 15. All the operating parts are supported upon a casting formed independent of the table, as shown in Fig. l, and secured thereto by bolts or screws, and this is a very desirable feature, for the reason that in case of breakage the parts may be repaired without requiring an entirely new machine-frame. In upwardly-project-ing cars 10 is journaled the pivoting-pin 17 of a socket, 18, which is provided with a suitable operating-lever, 19. The lower face of the socket is provided with a segment of a gear, 20, which meshes with the grooves i in the reciprocating holder, and in the movement of the operating-lever the holder is reciprocated back and forth to cause the operation of the tool carried thereby. The front end of the holder is provided with a suitable socket, and on its outer periphery, at opposite points, longitudinal grooves 21 are formed, adapted to receive the end of a springpin, 22, supported in the bracket 15. This pin, fitting in the longitudinal grooves, guides the holder in its reciprocating movement and prevents any variation therefrom; but when it is desired to reverse the action of the tool it is only necessary to lift the thumb-piece formed upon the spring-pin and revolve the holder until the pin comes in contact with the groove upon the other side. Bearings similar to 14c and 15 and formed integral with the latter are provided for the holder G, which consists of a screw-threaded rod carrying upon its forward end a socketadapted to receive a boring-tool. The bearings of the red are smooth, and in order to obtain the boring movement necessaryI provide a divided nut,

7a, the parts of which are screw-threaded internally, one part being provided with a pivoted handle and catch, m, by means of which the parts maybe brought together and secured in place tightly around the shaft of the holder (3. A suitable handle is provided, and when this is revolved the holder will be advanced spirally by means of the screw-threaded divided nut to effect the boring operation. \Vhen the boring has been completed, the di vided nut can be separated and the tool be withdrawn by moving the shaft (7 longitudinally instead of by rotating it.

A suitable stop, 23, adjustable, as shown, is provided upon the holder 0 outside of its bearing, and by means of this stop the depth of the hole to be bored may be regulated, the stop coming in contact with the face of the bearing. After the hole has been. bored the parts of the divided nut may be separated and the holder drawn back without revolving it to remove the boring-tool from the opening made thereby.

In Figs. 1 and 3 I have represented the machine as adapted to be used for mortising and as provided with a mortising-tool; but in Fig. 6 I have represented a modification showing the machine adapted to perform a different kind of worknan1ely, the cutting of miters, or rather the mitering of strips to form pickets. In this case a supplemental work-support is adjustably held upon the table either by means of the arm 13 and pin 10, heretofore described, or by a separate adjustable clamp, 24:. This supplemental work-support consists of an angular lower plate, 25, having a slotted guiding-plate, 26, supported adj ustably thereon by means of thumb-screws passing through curved slots, by means of which proper support can be given to the picket or other work supported on the table. The curved slots allow the plate 26 to be adjusted to conform to any irregularity of the strip operated upon. An end piece, 27, is provided with an angular notch adapted to receive the end of the strip, and this brings the inner corner of the strip in direct line with the tool 28, which in this case maybe a chisel, and in the reciprocation of the holder the corner is taken off. The strip may then be reversed and the opposite corner be removed in like manner, and a picket is thus formed. It will be understood that any kind of mitering may be done in the same way.

I claim as my invention- 1. In combination, the supporting-frame, the work-supporting table consisting of the cross-piece f, the brackets supporting a piece, A, the screws for adjusting the brackets vertically, and pins supported by the frame and arranged to bear upon the under side of the piece A, said pins also being vertically adj use able, whereby the table may be raised or lowered and supported in any position by the brackets and pins, substantially as described.

2. In combination, a tool-holder, a supporting-frame cast in one piece and in elongated form, the said tool-holder being arranged longitudinally of the frame, the said frame being adapted in width to the tool-holder and having the raised portion 0, for supporting the tool-holder, and a lower portion, 1), and a piece, f, and table extending at right angles to the elongated frame and across the lower portion, substantially as described.

3. In combination the cross-piece f, supported on the frame and having the screwrods at its ends extending vertically and having bearings at the top and bottom of the piece f, the piece A, the brackets secured to the said piece and extendin g rearwardly therefrom, and having screw-threaded nuts in engagement with the screw-rods at points intermediate of the bearings, the said partsviz., the screw-rod and braeketseonstituting the supporting means for the piece A, and also the adjusting means for the same, substantially as described.

4. In a wood-working machine, a reciprocating tool-holder, an adjustable table, A, and a supplemental work-support having. an angular bearing-face and a notch for the end of the work, substantially as described.

5. In combination, the table A, supported ad ,justably on the'eross-piece f, said crosspiece being adjustable longitudinally, an adjustable bracket supporting adjustable pins for the under part of the table, an adjustable arm and pin for preventing vertical displacement of the work, and horizon tally-adj ustable pins for preventing forward displacement, substantially as described.

In testimonywhereof I aflix my signature in presence of two witnesses.

JOHN SCI-IOFIELD.

\Vitnesses:

GEORGE L. DICKERMAN, J. W. VAIL. 

